<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert title="添加商品信息" type="info" show-icon center :closable="false"> </el-alert>

      <el-steps align-center :space="200" :active="activeIndex - 0" finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClick">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model.number="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model.number="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model.number="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="{
                  expandTrigger: 'hover',
                  label: 'cat_name',
                  value: 'cat_id',
                  children: 'children'
                }"
                @change="handleSelectChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTabdata" :key="item.attr_id">
              <el-checkbox-group v-model="attr_vals">
                <el-checkbox :label="name" v-for="(name, index) in item.attr_vals" :key="index" border>{{ name }}</el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTabdata" :key="item.attr_id">
              <el-input v-model="item.attr_vals"> </el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://www.jinglingdan.top:9999/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <el-button type="primary" class="btnAdd" @click="addGood">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="imgPreviewDialogVisible" width="50%">
      <img :src="previewImgUrl" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: '',
        goods_weight: '',
        goods_number: '',
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请输入选择商品分类', trigger: 'blur' }]
      },
      cateList: [],
      manyTabdata: [],
      onlyTabdata: [],
      attr_vals: [],
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewImgUrl: '',
      imgPreviewDialogVisible: false
    }
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.cateList = res.data
    },
    handleSelectChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(newActiveName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClick() {
      // 如果激活的是商品参数
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        console.log(res)
        this.manyTabdata = res.data
        this.attr_vals = res.data[0].attr_vals
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        // res.data.forEach(item => {
        //   item.attr_vals =
        //     item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        // })
        this.onlyTabdata = res.data
      }
    },
    handlePreview(file) {
      this.previewImgUrl = file.response.data.url
      this.imgPreviewDialogVisible = true
    },
    handleRemove(file) {
      // 获取删除图片的路径
      const removeImgPath = file.response.data.tmp_path
      // 从pics数组中查找对应图片的索引值
      const index = this.addForm.pics.findIndex(item => item.pic === removeImgPath)
      // 对应索引的路径从数组中删除
      this.addForm.pics.splice(index, 1)
    },
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },
    addGood() {
      this.$refs.addFormRef.validate(async val => {
        if (!val) {
          return this.$message.error('请填写必要的表单项')
        }
        // goods_cat有绑定级联选择器，只能绑定数组形式，直接转成字符串会报错
        const cloneForm = _.cloneDeep(this.addForm)
        cloneForm.goods_cat = cloneForm.goods_cat.join(',')
        this.manyTabdata.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          cloneForm.attrs.push(newInfo)
        })
        this.onlyTabdata.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          cloneForm.attrs.push(newInfo)
        })
        const { data: res } = await this.$http.post('goods', cloneForm)
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) return this.addForm.goods_cat[2]
      return null
    }
  },
  created() {
    this.getCateList()
  }
}
</script>

<style lang="less" scoped>
.btnAdd {
  margin-top: 15px;
}
</style>
